A REVOLUTIONARY hearing aid was just one of a number of new technological exhibits on show at the Men's Health Expo in Tamworth yesterday to coincide with Men's Health Week. A REVOLUTIONARY hearing aid was just one of a number of new technological exhibits on show at the Men's Health Expo in Tamworth yesterday to coincide with Men's Health Week. The hearing aid allows the person wearing it to focus on a specific conversation more clearly while drowning out any other noises in the room. It has been designed to select the best speech over noise using parallel processing through a new concept called syncro. Spokesman James Battersby for Oticon, which manufactures the hearing aid, said already the revolutionary device was a big hit in Australia after only being launched three weeks ago.